Rosielle L J, Cooper E E
Iowa State University, Ames, USA.
Mem Cognit. 2001 Jan;29(1):68-82. doi: 10.3758/bf03195742.
The purpose of the present investigation was to determine whether the orientation between an object's parts is coded categorically for object recognition and physical discrimination. In three experiments, line drawings of novel objects in which the relative orientation of object parts varied by steps of 30 degrees were used. Participants performed either an object recognition task, in which they had to determine whether two objects were composed of the same set of parts, or a physical discrimination task, in which they had to determine whether two objects were physically identical. For object recognition, participants found it more difficult to compare the 0 degrees and 30 degrees versions and the 90 degrees and 60 degrees versions of an object than to compare the 30 degrees and 60 degrees versions, but only at an extended interstimulus interval (ISI). Categorical coding was also found in the physical discrimination task. These results suggest that relative orientation is coded categorically for both object recognition and physical discrimination, although metric information appears to be coded as well, especially at brief ISIs.
本研究的目的是确定物体各部分之间的方向是否以类别形式编码，用于物体识别和物理辨别。在三个实验中，使用了新颖物体的线条图，其中物体各部分的相对方向以30度为步长变化。参与者执行了一项物体识别任务，即他们必须确定两个物体是否由相同的一组部分组成，或者执行一项物理辨别任务，即他们必须确定两个物体在物理上是否相同。对于物体识别，参与者发现比较物体的0度和30度版本以及90度和60度版本比比较30度和60度版本更困难，但仅在延长的刺激间隔（ISI）时如此。在物理辨别任务中也发现了类别编码。这些结果表明，相对方向对于物体识别和物理辨别均以类别形式编码，尽管度量信息似乎也被编码，尤其是在短暂的ISI时。
